- watchOS 4
Apple unveiled watchOS 4 on Monday, the newest version of the operating system for the Apple Watch. It features a couple of new watch faces, the most important of which puts Siri cards front and center. They can tell you things like when to leave for work, the music you're playing, how your workout is going and more. WatchOS 4 has a new workout UI, support for two-way data exchange with workout machines and mo